Air Conditioning

The National Electrical Code and Heating, Ventilation, and Air Conditioning have some shared roles for both electricians and HVAC Installers and technicians. There are some specific categories in the NEC that are applied to HVAC and making calculations for circuits and wire sizing for HVAC appliances. Article 440 does not cover such household appliances as room air-conditioners, household refrigerators and freezers, drinking water coolers, or beverage dispensing machines, because these are appliances and must comply with Article 422.  Article 440 requires you to locate the disconnecting means within sight of, and readily accessible from, the air-conditioning or refrigerating equipment.
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